Melanonychiahttps://en.wikipedia.org/wiki/Melanonychia
Melanonychia hija pigmentazzjoni sewda jew kannella tal-pjanċa tad-dwiefer normali, u tista’ tkun preżenti bħala seba normali f’ħafna ċifri fil-popolazzjoni Afro‑Karibew.

Faxxa wiesgħa u pigmentata profondament, b’linji irregolari u estensjoni pigmentata fuq it‑tessuti periunguwali, hija sinjal għal melanoma.

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  • Linji multipli mhux tas‑soltu huma osservati. Melanonychia hija l‑aktar benin, iżda jekk ikun hemm ħafna linji irregolari f’dan il‑livell, tista’ tiġi kkunsidrata biex isir bijopsija.
  • Muehrcke's lines
  • Brown banding
References Melanonychia: Etiology, Diagnosis, and Treatment 32055501 
NIH
Ħafna pazjenti jsoħol melanonychia li tikkonċerna, peress li tikkawża kulur kannella-iswed tal-pjanċa tad-dwiefer. Hija raġuni frekwenti għall-kulur tad-dwiefer, b'kawżi li jvarjaw minn beninni għal potenzjalment serji, bħal melanomi. Melanonychia simili għal faxxa lonġitudinali tista' tirriżulta minn diversi fatturi lokali jew sistemiċi.
Melanonychia is a very worrisome entity for most patients. It is characterized by brownish black discoloration of nail plate and is a common cause of nail plate pigmentation. The aetiology of melanonychia ranges from more common benign causes to less common invasive and in situ melanomas. Melanonychia especially in a longitudinal band form can be due to both local and systemic causes.
 Melanonychia – Clues for a Correct Diagnosis 32064201 
NIH
Melanonychia represents a brown to black discoloration of the nail plate that may be induced by benign or malignant causes. Two main mechanisms are involved in the appearance of melanonychias, i.e., melanocytic activation and melanocytic hyperplasia.